CN104386991B - Water glass alkali-activated slag concrete circulation utilization method - Google Patents
Water glass alkali-activated slag concrete circulation utilization method Download PDFInfo
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- CN104386991B CN104386991B CN201410583321.9A CN201410583321A CN104386991B CN 104386991 B CN104386991 B CN 104386991B CN 201410583321 A CN201410583321 A CN 201410583321A CN 104386991 B CN104386991 B CN 104386991B
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- slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
Water glass alkali-activated slag concrete circulation utilization method, first to be removed the coarse aggregate close with slag chemical composition of chemical composition outside loss on ignition and moisture and fine aggregate proportioning by charge calculation, then alkali-activated carbonatite cementitious material concrete is prepared after using the aggregate of this proportioning jointly to mix with alkali-activator water glass, by the time after concrete End Of Service, again it is calcined at 1450-1500 DEG C, shrend, namely activated gelling material is again obtained, thus achieve the recycle of water glass alkali-activated carbonatite gelling material, present invention achieves the concrete recycling of alkali-activated carbonatite, limestone resource can be saved, there is significant economy and operability.
Description
Technical field
The invention belongs to building material field, particularly one carries out the concrete method of secondary clacining recycle water glass alkali-activated slag again by design concrete mix.
Background technology
Slag is the primary solids waste of metallurgical industry, and main component is silicate and aluminosilicate.Slag is a kind of latent hydraulicity material, can inspire the activity of slag thus produce intensity after adding alkali-activator.This alkali-activated slag being substituted cement for the preparation of alkali-activated slag concrete, the series of problems such as the environmental pollution because occurring in silicate cement production process, ecological damage, energy dissipation, resource exhaustion can being reduced.But it is similar to traditional portland, a large amount of building wastes will be produced after alkali-activated slag concrete terminates under arms, and building waste has exacerbated the nervous situation of China's urban land, resource, have a strong impact on the coordinated development of social economy and ecotope, therefore, the regeneration doing building waste well is extremely urgent.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of water glass alkali-activated slag concrete circulation utilization method, by the concrete mix of adjustment alkali-activated carbonatite gelling material preparation, make the chemical composition of its concrete entirety identical with raw ingredients of cement or close, by the time after this concrete End Of Service is removed, calcined as new gelling material again, this technique can make the concrete debris of the alkali-activated carbonatite gelling material preparation after removing obtain second stage employ, there is technique simple, energy-conserving and environment-protective, it is convenient to control, be convenient to the feature of industrial applications
To achieve these goals, the technical solution used in the present invention is:
Water glass alkali-activated slag concrete circulation utilization method, is characterized in that, comprising:
Step one, measure the chemical composition of the reinforcement of concrete fine aggregate, coarse aggregate and alkali-activated carbonatite slag used, and by charge calculation, when being not counted in loss on ignition, make (CaO+MgO) in thick, fine aggregate and slag three kinds of solid mixtures: (SiO
2+ Al
2o
3) be greater than 1.5 and be less than 2.4, determine the mass ratio of concrete coarse aggregate, fine aggregate and slag;
Step 2, meets thick, fine aggregate and the ground slag powder of chemical constitution in step one, prepares alkali-activated slag concrete with alkali-activator water glass after jointly mixing;
Step 3, after this concrete terminates under arms, it is broken, grinding is the powder that particle diameter is less than 80 microns, be placed on calcining also cooling fast at 1450 DEG C-1500 DEG C in calciner again, material after calcining passes through below fragmentation, grinding to 80 micron again, namely obtain new gelling material, thus the useful component in slag and coarse-fine aggregate is reused.
Described fine aggregate is sand, and particle diameter is less than 5mm; Described coarse aggregate is stone, and particle diameter is greater than 5mm.
If the mass ratio of stone and sand is greater than 2.0, then the fragmentation of part stone is become Machine-made Sand, to guarantee that coarse aggregate and fine aggregate mass ratio are between 1.5-2.0.
The landfill general with traditional architecture disposal of garbage or be used as compared with regeneration aggregate, present technology provides and a kind ofly can reuse the method for alkali-activated carbonatite concrete construction rubbish as the raw material of production gelling material.Use this technology to achieve the concrete recycling of alkali-activated carbonatite, can limestone resource be saved.Meanwhile, above-mentioned technique is at Concrete, and discarded concrete is broken, grinding, and the aspects such as secondary clacining are all proven technique, have significant economy and operability.
Accompanying drawing explanation
Fig. 1 is that the present invention tests proportioning raw material position view residing in five yuan of phasors.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
Water glass alkali-activated slag concrete circulation utilization method of the present invention, first the chemical composition of concrete batching sand used (i.e. fine aggregate), stone (i.e. coarse aggregate) and slag is measured, under regular situation, its composition (mass percent) index is as follows:
The loss on ignition of sand: 1-2%, the SiO of the CaO of 2-5%, 60-80%
2, the Al of 10-15%
2o
3, the Fe of 2-4%
2o
3, the R of the MgO of 0-2%, 1-6%
2o, and surplus impurity;
The loss on ignition of stone: 20-35%, the SiO of the CaO of 30-40%, 10-20%
2, the Al of 1-3%
2o
3, the Fe of 0-2%
2o
3, the R of the MgO of 2-18%, 0-1.5%
2o, and surplus impurity;
The loss on ignition of slag: 1-2%, the SiO of the CaO of 40-65%, 15-25%
2, the Al of 1-5%
2o
3, the Fe of 1-8%
2o
3, the R of the MgO of 1-8%, 0-2%
2o, and surplus impurity.
In the present embodiment, concrete Selection parameter is shown in Table 1, and according to the chemical composition in table 1, the proportioning calculated between stone, sand, slag is 3.3:0.7:1.Under this proportioning, remove its chemical composition outside moisture and loss on ignition in concrete and all fall into Fig. 1 square frame position, in Fig. 1, A represents slag chemical composition, and B represents phosphorus slag chemical composition, and C represents test sample composition, and D represents portland cement clinker chemical composition.Can find out, this composition and between Portland clinker and granulated blast-furnace slag, close with electric furnace phosphoric slag composition, by melting, shrend can obtain certain active gelling material.
Table 1 concrete material chemical composition (mass percent)
| Raw material | Loss on ignition | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | MgO | R 2O | Impurity | Add up to |
| Stone | 29.68 | 36.87 | 16.17 | 2.34 | 0.696 | 12.56 | 0.827 | Surplus | 100％ |
| Sand | 1.4 | 2.61 | 73.99 | 12.44 | 2.54 | 0.62 | 5.3 | Surplus | 100％ |
| Slag | 1.8 | 62.7 | 20.01 | 3.82 | 4 | 1.48 | 1.2 | Surplus | 100％ |
Because the content of the coarse aggregate stone in above-mentioned raw materials ratio is compared higher than concrete mix current at present.Wherein part stone can be broken into particle diameter and be less than the fine aggregate of 5mm and natural sand jointly as fine aggregate concrete batching.
1m
3in concrete, slag is 430kg, 671kg fine aggregate (wherein 301kg sand listed by table 1,370kg stone listed by table 1 is broken into the Machine-made Sand that particle diameter is less than 5mm), 1049kg coarse aggregate, water glass as alkali-activator mixes according to 5% of slag quality, i.e. 21.5kg, polycarboxylate water-reducer 4.3kg, water 215kg.
Because example is checking property experiment, simultaneously concrete component along with time variations little, to subsequent experimental without substantial influence, therefore without the need to by concrete pouring to ten year even many decades.The 15L concrete using this proportioning to prepare after natural curing to 2 month, through fragmentation, grinding to fineness more than 400m
2mixed again after/Kg, then therefrom taken out about 1000g fine powder 2 parts respectively.Two parts of fine powders put into crucible, and in retort furnace, 1470 DEG C of calcinings were taken out after 1 hour.Material in crucible after taking-up melts completely.Material naturally cooling in a dry pot, the molten materials in another crucible is poured in previously prepd, the metal bucket of water filled fast, makes its shrend.Shrend products obtained therefrom is can the silicates gelling material of second stage employ.
Material after shrend is taken 450g add 5% water glass and 1350g standard sand make mortar specimen, measure the anti-folding of its 28d and reach 6.5MPa, ultimate compression strength 44.3MPa.
Claims (5)
1. water glass alkali-activated slag concrete circulation utilization method, is characterized in that, comprising:
Step one, measure the chemical composition of the reinforcement of concrete fine aggregate, coarse aggregate and alkali-activated carbonatite slag used, and by charge calculation, when being not counted in loss on ignition, make (CaO+MgO) in thick, fine aggregate and slag three kinds of solid mixtures: (SiO
2+ Al
2o
3) be greater than 1.5 and be less than 2.4, determine the mass ratio of concrete coarse aggregate, fine aggregate and slag;
Step 2, meets thick, fine aggregate and the slag of chemical constitution in step one, prepares alkali-activated slag concrete with alkali-activator water glass after jointly mixing;
Step 3, after this concrete terminates under arms, it is broken, grinding is the powder that particle diameter is less than 80 microns, be placed on calcining also cooling fast at 1450 DEG C-1500 DEG C in calciner again, material after calcining passes through below fragmentation, grinding to 80 micron again, namely obtain new gelling material, thus the useful component in slag and coarse-fine aggregate is reused;
Described fine aggregate is sand, and particle diameter is less than 5mm; Described coarse aggregate is stone, and particle diameter is greater than 5mm;
Be calculated in mass percent, the chemical composition of described sand, stone and slag is as follows:
The loss on ignition of sand: 1-2%, the SiO of the CaO of 2-5%, 60-80%
2, the Al of 10-15%
2o
3, the Fe of 2-4%
2o
3, the R of the MgO of 0-2%, 1-6%
2o, and surplus impurity;
The loss on ignition of stone: 20-35%, the SiO of the CaO of 30-40%, 10-20%
2, the Al of 1-3%
2o
3, the Fe of 0-2%
2o
3, the R of the MgO of 2-18%, 0-1.5%
2o, and surplus impurity;
The loss on ignition of slag: 1-2%, the SiO of the CaO of 40-65%, 15-25%
2, the Al of 1-5%
2o
3, the Fe of 1-8%
2o
3, the R of the MgO of 1-8%, 0-2%
2o, and surplus impurity.
2. water glass alkali-activated slag concrete circulation utilization method according to claim 1, it is characterized in that, if the mass ratio of stone and sand is greater than 2.0, then the fragmentation of part stone is become Machine-made Sand, to guarantee that coarse aggregate and fine aggregate mass ratio are between 1.5-2.0.
3. water glass alkali-activated slag concrete circulation utilization method according to claim 1, it is characterized in that, be calculated in mass percent, the chemical composition of described sand, stone and slag is as follows:
Sand: the loss on ignition of 1.4%, the CaO of 2.61%, the SiO of 73.99%
2, the Al of 12.44%
2o
3, the Fe of 2.54%
2o
3, the MgO of 0.62%, the R of 5.3%
2o, and surplus impurity;
Stone: the loss on ignition of 29.68%, the CaO of 36.87%, the SiO of 16.17%
2, the Al of 2.34%
2o
3, the Fe of 0.696%
2o
3, the MgO of 12.56%, the R of 0.827%
2o, and surplus impurity;
Slag: the loss on ignition of 1.8%, the CaO of 62.7%, the SiO of 20.01%
2, the Al of 3.82%
2o
3, the Fe of 4%
2o
3, the MgO of 1.48%, the R of 1.2%
2o, and surplus impurity.
4. water glass alkali-activated slag concrete circulation utilization method according to claim 1, is characterized in that, the quality proportioning of described stone, sand and slag is 3.3:0.7:1.
5. water glass alkali-activated slag concrete circulation utilization method according to claim 1, is characterized in that, also add water and water reducer when preparing alkali-activated slag concrete after mixing in described step 2.
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| CN105601189B (en) * | 2015-12-24 | 2018-11-02 | 中国建筑材料科学研究总院 | Alkali-activated carbonatite concrete and preparation method thereof |
| CN111056764B (en) * | 2019-12-12 | 2020-11-06 | 山东大学 | Efficient solid waste base gelation activity excitant |
| CN113121157A (en) * | 2021-04-21 | 2021-07-16 | 哈尔滨工业大学（深圳） | Quick-hardening early-strength muck geopolymer mortar and preparation method and application thereof |
Citations (4)
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|---|---|---|---|---|
| CN102060485A (en) * | 2010-12-02 | 2011-05-18 | 济南大学 | Cement concrete, and preparation method and recycling method thereof |
| CN102795798A (en) * | 2012-07-18 | 2012-11-28 | 西安建筑科技大学 | Method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride |
| CN103274658A (en) * | 2013-01-14 | 2013-09-04 | 虞克夫 | Industrial waste residue and solid danger refuse resource utilization method |
| CN103553395A (en) * | 2013-10-17 | 2014-02-05 | 北京新奥混凝土集团有限公司 | Recycled green concrete with low cement content and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT413535B (en) * | 2004-04-05 | 2006-03-15 | Holcim Ltd | HYDRAULIC BINDER AND METHOD FOR THE PRODUCTION THEREOF |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060485A (en) * | 2010-12-02 | 2011-05-18 | 济南大学 | Cement concrete, and preparation method and recycling method thereof |
| CN102795798A (en) * | 2012-07-18 | 2012-11-28 | 西安建筑科技大学 | Method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride |
| CN103274658A (en) * | 2013-01-14 | 2013-09-04 | 虞克夫 | Industrial waste residue and solid danger refuse resource utilization method |
| CN103553395A (en) * | 2013-10-17 | 2014-02-05 | 北京新奥混凝土集团有限公司 | Recycled green concrete with low cement content and preparation method thereof |
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Application publication date: 20150304 Assignee: Xi'an Jianke Baolong New Material Co.,Ltd. Assignor: XIAN University OF ARCHITECTURE AND TECHNOLOG Contract record no.: X2020980009912 Denomination of invention: Recycling method of sodium silicate alkali activated slag concrete Granted publication date: 20160413 License type: Common License Record date: 20201224 |
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Assignee: Xi'an Jianke Baolong New Material Co.,Ltd. Assignor: XIAN University OF ARCHITECTURE AND TECHNOLOG Contract record no.: X2020980009912 Date of cancellation: 20220506 |
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Effective date of registration: 20230828 Address after: 725000 new material industrial park, high tech Industrial Development Zone, Ankang City, Shaanxi Province Patentee after: Ankang shengmeibao new environmental protection building materials Co.,Ltd. Address before: 710055 No. 13, Yanta Road, Shaanxi, Xi'an Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG |
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